Update 4

omg! there is a muscle on my arm! a strongish one i can sorta flex!
it's the
brachioradialis (brachi, L: "upper arm"; radialis, L: "radius of the arm")
- obtains its name from its origin on the upper arm and its insertion on the radius
- flexes the forearm at the elbow

rock. i wonder what else is different on me! this is so exciting!